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(man W. W. auf. P. PURSEL. LATCH AND LOCK COMBINED.. 100.405.050.PatentedJune 1l, 1880.

W1 TNESSES N. PETERS. Phnlwlilhognpbr. Walhingun. D. C.

, UNITED STATES PATENT OFFICE.

WILLIAM lV. PURSEL AND FRANK P. PURSEL, OF BERVICK, COLUMBIA COUNTY,PENNSYLVANIA.

LATCH AND LOCK ColvlBlNED.

SPECIFICATION forming part of Letters Patent N0. 405,050, dated J une11, 1889. Application filed March 29, 1888. Serial No. 268,825. (Model.)

To all whom t may concern:

Be it known that we, WILLIAM W. PURsEL and FRANK P. PURSEL, citizens ofthe United States, residing at Berwick, in the county of Columbia andState of Pennsylvania, have invented new and useful Improvements inLatches and Locks Combined, of which the following is a specification.

Our invention relates to improvements in locks; and it has for itsobject to provide improved means for connecting and disconnecting theoutside and inside knobs.

The invention consists in a certain novel construction and combinationof devices, fully set forth hereinafter in connection with theaccompanying drawings, wherein- Figure l is a perspective view of thelock. Fig. 2 is a front view with theface-plate removed. Fig. 3 is ahorizontal sectional view of the lock on the line a: o: of Fig. 2. Fig,4. is a detail sectional view of the knob-shaft, t-aken longitudinally.Fig. 5 is a detail View of the key.

Referring by letter to the drawings, A designates the case of the lock.B designates the sliding bolted mounted therein. C designates a springbearing against a shoulder b on the bolt and norinallyholding itextended, and D designates a cross-head at the rear end ofthe bolt. Atumbler E is mounted in the casein front of the said cross-head, wherebywhen it is rotated one of its ends bears against the cross-head andretracts the bolt, and the barrel F of the tumbler is tubular, and isprovided in one side with a longitudinal slot G. The bolt is providednear its front end with a socket H, which aligns with an aperture I inthe side of the lock when the bolt is eX- tended, and a spring-latch Kis attached to the side of the lock, and is provided with a pin k, whichprojects through the said aperture and engages the socket to hold the.loolt in its extended position.

L represents a tubular knob-shaft, which is mounted at its inner end inthe barrel of the tumbler, and 'is' provided on one side with a rib M,which engages the longitudinal slot therein and enables the tumbler tobe rotated by the shaft. A knob N is attached to the outer end of theshaft L,'and a shoulder n is formed in the interior of the shaftashortdisj tance from'its outer end.

A knob-shaft O is mounted in the tubular shaft, and is provided at oneend with ahead o, which engages the shoulder n and prevents the shaftsfrom being drawn apart, but allows independent rotation thereof. Thisshaft O is provided on one side with a longitudinal groove or notch P,which is adapted to be aligned with an aperture S in the side of thetubular shaft, and a spring-latch R is mounted on the side of thetubular shaft, and is provided with a pin r, which projects through thesaid aperture and engages the groove or notch, thereby locking theshafts together for simultaneous operation. The outer end of the shaft Ois squared to enable the knob Q to be secured thereon.

When the latch R is in its engaging position, it rests in a longitudinalgroove s in the side of the tubular shaft, and a sliding ring or handleT is mounted on the saidllatch,and is adapted to be moved from one endto the other of the same. When the said ring or handle is located at thefree end of the latch, it fits in a transverse groove s' in the side ofthe tubular shaft, and therefore allows the pin r to engage the grooveor notch in the inner shaft; but when the ring or handle is drawnoutward toward the other end of the latch it raises the same out of thesaid longitudinal groove s and withdraws the pin r out of engagementwith the groove or notch in the inner shaft.

U represents the ward of a key, which is mounted permanently in thecasein such a y position that when turned it will engage one end of theVcross-head on the bolt and retract the latter. This ward is providedwith the short post V, which projects slightly beyond the side of thecase, and is provided with a longitudinal groove W, and when it isdesired to operate the ward a key having a tubular shank provided in oneside with a longitudinal rib or a stud is engagedover the said post insuch a manner that the said rib or stud will engage the groove in thelatter.

The operation of the improved lock is as follows: The knob having thetubular shaft attached thereto is placed on the inside ofthe door, andas it -operates directly 011 the bolt the door may be opened at any timefrom the inside, but can only be opened from the outside when theinterior shaft is locked to the IOO tubular shaft. The means for solocking the said shafts together are mounted on the tubular shaft, andtherefore the improved lock performs the additional function of adeadlatch.

It will be seen that knob-shafts thus connected may be applied to anyordinary lock, so thatltheir usefulness is not confined to the lockherein described.

The spring hereinbefore mentioned is peculiarly adapted to actuate theboltv promptly Without much strain l on the spring. The spring is ofsuch a length as t0 reach from one side of the lock-case to the other,and it bears at its ends against the front side 0f studs or shoulders ce at the sides of the case. Thus the full lengt-h of the spring is freeto be bent, and the bolt is provided with a rounded shoulder b, (abovementioned,) which bears against the center of the said spring.

The principal reason for the frequentbreakage of springs in locks ofthis character is, that they are ordinarily short and are bent abruptly;but in the improved lock the spring is very long, and consequently thebend is gradual and comparatively slight.

Having thus described the invention, what we claim, and desire to secureby Letters Patent of the United States, is-

l. In a lock, the combination of the tubular shaft connected to thetumbler, the shaft O,

mounted in the tubular shaft and having a groove or notch in its sideadapted to be aligned with an aperture in the tubular shaft, thespring-latch mounted on the tubular shaft and engaging the said apertureand groove or notch, and the sliding ring or handle T, mounted on thelatch, all constructed, arranged, and operated substantially as and forthe purpose specified.

2. In a lock, the combination, with the tu1nbler having a barrelprovided with a groove, of the tubular shaft mounted in the said barreland having a rib M on its side engaging the said groove, the removableknob on the end of the shaft, the knob-shaft O, mounted in the tubularshaft and having a head o engaging a shoulder n in the tubular shaft,the knob attached to the shaft O, and the springlatch R, mounted on thetubular shaft and adapted, When in its normal position, to lock the saidshafts together, substantially as specified.

In testi mony that we claim the foregoing as our own We have heretoaiiixed our signatures in presence of two Witnesses.

WILLIAM W. PURSEL. FRANK P. PURSEL.

Witnesses:

C. W. MILLER, S. F. PEAoooK.

